<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="RSS Reader"> <Grid xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Grid.Resources> <ControlTemplate x:Key="buttonTemplate"> <Grid> <Ellipse Width="100" Height="100"> <Ellipse.Fill> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <GradientStop Offset="0" Color="Blue"/> <GradientStop Offset="1" Color="Red"/> </LinearGradientBrush> </Ellipse.Fill> </Ellipse> <Ellipse Width="80" Height="80"> <Ellipse.Fill> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <GradientStop Offset="0" Color="White"/> <GradientStop Offset="1" Color="Transparent"/> </LinearGradientBrush> </Ellipse.Fill> </Ellipse> </Grid> </ControlTemplate> </Grid.Resources> <Button Template="{StaticResource buttonTemplate}">OK</Button> </Grid> </Window>